CVE-2023-53783— blk-iocost: fix divide by 0 error in calc_lcoefs()
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I. Basic Information for CVE-2023-53783
Vulnerability Information
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Vulnerability Title
blk-iocost: fix divide by 0 error in calc_lcoefs()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: blk-iocost: fix divide by 0 error in calc_lcoefs() echo max of u64 to cost.model can cause divide by 0 error. # echo 8:0 rbps=18446744073709551615 > /sys/fs/cgroup/io.cost.model divide error: 0000 [#1] PREEMPT SMP RIP: 0010:calc_lcoefs+0x4c/0xc0 Call Trace: <TASK> ioc_refresh_params+0x2b3/0x4f0 ioc_cost_model_write+0x3cb/0x4c0 ? _copy_from_iter+0x6d/0x6c0 ? kernfs_fop_write_iter+0xfc/0x270 cgroup_file_write+0xa0/0x200 kernfs_fop_write_iter+0x17d/0x270 vfs_write+0x414/0x620 ksys_write+0x73/0x160 __x64_sys_write+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd calc_lcoefs() uses the input value of cost.model in DIV_ROUND_UP_ULL, overflow would happen if bps plus IOC_PAGE_SIZE is greater than ULLONG_MAX, it can cause divide by 0 error. Fix the problem by setting basecost
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于calc_lcoefs函数中存在除零错误。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-53783
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Same Patch Batch · Linux · 2025-12-09 · 152 CVEs total
| CVE-2023-53827 | Bluetooth: L2CAP: Fix use-after-free in l2cap_disconnect_{req,rsp} | |
| CVE-2023-53846 | f2fs: fix to do sanity check on direct node in truncate_dnode() | |
| CVE-2023-53845 | nilfs2: fix infinite loop in nilfs_mdt_get_block() | |
| CVE-2023-53844 | drm/ttm: Don't leak a resource on swapout move error | |
| CVE-2023-53843 | net: openvswitch: reject negative ifindex | |
| CVE-2023-53842 | ASoC: codecs: wcd-mbhc-v2: fix resource leaks on component remove | |
| CVE-2023-53841 | devlink: report devlink_port_type_warn source device | |
| CVE-2023-53840 | usb: early: xhci-dbc: Fix a potential out-of-bound memory access | |
| CVE-2023-53839 | dccp: fix data-race around dp->dccps_mss_cache | |
| CVE-2023-53838 | f2fs: synchronize atomic write aborts | |
| CVE-2023-53837 | drm/msm: fix NULL-deref on snapshot tear down | |
| CVE-2023-53836 | bpf, sockmap: Fix skb refcnt race after locking changes | |
| CVE-2023-53834 | iio: adc: ina2xx: avoid NULL pointer dereference on OF device match | |
| CVE-2023-53833 | drm/i915: Fix NULL ptr deref by checking new_crtc_state | |
| CVE-2023-53832 | md/raid10: fix null-ptr-deref in raid10_sync_request | |
| CVE-2023-53831 | net: read sk->sk_family once in sk_mc_loop() | |
| CVE-2023-53830 | platform/x86: think-lmi: Fix memory leak when showing current settings | |
| CVE-2023-53829 | f2fs: flush inode if atomic file is aborted | |
| CVE-2023-53828 | Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_add_adv_monitor() | |
| CVE-2022-50675 | arm64: mte: Avoid setting PG_mte_tagged if no tags cleared or restored |
Showing top 20 of 152 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
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scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
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scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
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